Programmable current PWM dimming controller

Abstract

An integrated system for supplying direct current and brightness dimming for light emitting diodes (LEDs) comprising: an LED driver power supply for supplying a constant direct current; an array of one or more LEDs; and an integrated programmable LED current pulse width modulation (PWM) dimming controller; wherein the integrated programmable LED current pulse width modulation (PWM) dimming controller comprising: a front control panel for controlling the brightness of the array of one or more LEDs; and an LED current PWM dimming module.

What is claimed is: 
     
       1. An integrated system for supplying direct current and brightness dimming for light emitting diodes (LEDs) comprising:
 an LED driver power supply for supplying a constant direct current; 
 an array of one or more LEDs; and 
 an integrated programmable LED current pulse width modulation (PWM) dimming controller comprising:
 a front control panel for controlling the brightness of the array of one or more LEDs; and 
 an LED current PWM dimming module; 
 
 wherein the front control panel is secured to the LED current PWM dimming module by a slot-in interface on the LED current PWM dimming module; and 
 wherein the LED current PWM dimming module comprises:
 an input voltage regulator; 
 an over current protection circuit; 
 an over temperature protection circuit; 
 a microcontroller for generating a pulse-width modulated current; 
 a direct current-to-direct current (DC-DC) buck converter for stepping down the pulse-width modulated current to establish a maximum LED-feeding current to said array of one or more LEDs; and 
 a current selector, coupled to the DC-DC buck converter, for selecting amount of LED-feeding current step down in the DC-DC buck converter. 
 
 
     
     
       2. The integrated system of  claim 1 , wherein the front control panel can be a mechanical-analog type controller or an electronic-digital type controller. 
     
     
       3. The integrated system of  claim 1 , wherein the DC-DC buck converter includes:
 an open circuit protection module; 
 a closed circuit protection module; 
 an automatic LED-feeding voltage compliance module; and 
 an automatic power conversion module.